New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    TYPE H

    The ratio of present age of A to that of B is 5:4 and

    the ratio of present age of A to that of C is 5:6. The average present age of A, B and C is 20 years. Find the age of B, after 8 years.
    A 25 years Correct Answer Incorrect Answer
    B 22 years Correct Answer Incorrect Answer
    C 24 years Correct Answer Incorrect Answer
    D 27 years Correct Answer Incorrect Answer
    E 20 years Correct Answer Incorrect Answer

    Solution

    The ratio of present age of A, B and C = 5 : 4 : 6 (5x, 4x,6x) The average present age of A, B and C = 20 years => (5x + 4x + 6x)/3 = 20 => 15x = 60 => x = 4 The age of B, after 8 years = 4 × 4 + 8 = 24 years

    Practice Next